optical telecommunication devices and networks, namely, wavelength division multiplexers, optical line amplifiers, transponders, wavelength converters, optical performance measuring devices, namely, optical power monitors, optical wavelength meters, optical signal-to-noise ratio monitors, optical spectrum analyzers, fault isolation indicators; dispersion compensators, optical cross-connectors, optical add-drop multiplexers; computer software for use in the field of network management for opti...

Communication systems services